Xor/fi: what changed
Revision 0 to 1. Removed lines have a minus sign; added lines have a plus sign.
Title: Xor/fi
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|---|---|---|---|
| 1 | + | # Xor boolean lausekkeessa | |
| 2 | + | ||
| 3 | + | Exclusive or (**xor**) eli eri- operaation tuloksena on [[True|true]] jos ainostaan toinen operandeista on true (tosi). | |
| 4 | + | ||
| 5 | + | ## Totuustaulukko | |
| 6 | + | ||
| 7 | + | | A | B | A xor B | | |
| 8 | + | |:---------:|:---------:|-------------| | |
| 9 | + | | false | false | false | | |
| 10 | + | | false | true | true | | |
| 11 | + | | true | false | true | | |
| 12 | + | | true | true | false | | |
| 13 | + | ||
| 14 | + | # Xor bittikohtaisissa toiminnoissa | |
| 15 | + | ||
| 16 | + | Bitettäin tehtävä xor asettaa kyseisen bitin ykköseksi (1) jos vastaavat bitit eivät ole samoja ja nollaksi (0) jos ne ovat samoja. | |
| 17 | + | ||
| 18 | + | ## Vaihda bitin arvo | |
| 19 | + | ||
| 20 | + | ``` pascal | |
| 21 | + | function ToggleBit(const AValue,ABitNumber:integer):integer; | |
| 22 | + | begin | |
| 23 | + | result := AValue xor 1 shl ABitNumber; | |
| 24 | + | end; | |
| 25 | + | ``` | |
| 26 | + | ||
| 27 | + | Jos kutsut funktiota ToggleBit(11,0) niin funktio palauttaa arvon 10. Jos kutsu on ToggleBit(10,2) niin palautettava arvo on 14. | |
| 28 | + | ||
| 29 | + | ### Lisätietoja | |
| 30 | + | ||
| 31 | + | - [[Variable parameter|XOR swap]] | |
| 32 | + | - [[Shl]] | |
| 33 | + | - [[Const/fi|Const]] | |
| 34 | + | - [[Function]] | |
| 35 | + | - [[Integer/fi|Integer]] | |
| 36 | + | ||
| 37 | + | --- | |
| 38 | + | *From the Free Pascal wiki, page "Xor/fi", as it stood on 2020-03-03 after a change by Trev, out of the wiki's dump of 2024-05-26. Copyright stays with the author who wrote it, according to the old wiki's [[Licensing]] page. If you have concerns about this material, [message the admin](/wiki-contact).* |